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Electromagnetic Field Theory

Electromagnetic Field Theory
In a dielectric material an applied field in x direction Ex = 5 v/m gives a polarization of px = 3/10π ux nc/m2. The susceptibility of the material is

 Zero.
  2.16.
 4.32.
 Infinity.

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Electromagnetic Field Theory
Voltage applied across a dielectric produces an electrostatic field 50 times greater than air. The dielectric constant of the dielectric will be

 10.
 50.
 5.
 20.

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Electromagnetic Field Theory
Conductor is static and the field is varying then emf will be induced. This principle is called

 none of these
 dynamically induced emf.
 virtually induced emf.
 static induced emf.

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Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is

 15 W.
  25 W.
 20 W.
 50 W.

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Electromagnetic Field Theory
The radiation pattern of a parabola antenna is

A figure of directional
Highly directional
None of these
Omnidirectional

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Electromagnetic Field Theory
An electric field of 1.92 × 103 N/C is maintained across two plates separated by 0.015 m. Potential difference across plates will be

 14.40 V.
 1.4 V.
 28.8 V.
 2.88 V.

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